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• W2054692562 abstract "This paper presents a time-frequency approach to detect perinatal hypoxia by characterizing the nonstationary nature of heart rate variability (HRV) signals. Quadratic time-frequency distributions (TFDs) are used to represent the HRV signals. Six features based on the instantaneous frequency (IF) of the lower frequency components of HRV signals are selected to establish a classifier using support vector machine. The classifier is trained and tested using the signals recorded from a neonatal piglet model under a controlled hypoxic condition, which provides reliable annotations on the data. The method shows superior performance in the detection of hypoxic epochs with sensitivity (89.8%), specificity (100%) and total accuracy (94.9%) compared with that based on frequency domain features, indicating that nonstationarity should be taken into account for a more accurate assessment of the newborn status with possible hypoxia when analyzing HRV signals." @default.
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• W2054692562 date "2013-05-01" @default.
• W2054692562 modified "2023-09-23" @default.
• W2054692562 title "Detection of perinatal hypoxia using time-frequency analysis of heart rate variability signals" @default.
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• W2054692562 doi "https://doi.org/10.1109/icassp.2013.6637787" @default.
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